Electromagnetic valve gear

ABSTRACT

The invention relates to an electromagnetic valve train of a charge cycle valve for an internal-combustion engine having an electromagnetic actuator and additional electric devices, such as a power part operating the actuator, a controlling and regulating device as well as a power supply.  
     For reducing electromagnetic compatibility problems and connection problems, it is suggested that at least one information connection between two devices is established by means of a glass fiber connection.

[0001] The invention relates to an electromagnetic valve train according to the preamble of claim 1.

[0002] In the case of such valve trains, usually an armature, which is indirectly or directly coupled with a gas outlet valve, is moved back and forth by the action upon coils. For acting upon the coils, a power supply is required which provides the required energy. Furthermore, the coils themselves are triggered by means of a power part which, in turn, is controlled by a controlling and regulating device. Often, a sensor is also arranged in the actuator, on the basis of whose signal the armature or valve position can be determined indirectly and directly. According to the construction, the sensor and the actuator, the controlling and regulating part as well as the electronic power system or other elements of the electromagnetic valve train are combined and integrally constructed with one another.

[0003] Conventionally, all information connections between the individual valve train elements, thus, for example, between the sensor and the valve control or the engine control, etc., are implemented by electric cables. However, this results in problems concerning electromagnetic stray radiation, in plug connection problems and in insulation problems.

[0004] It is an object of the present invention to avoid these problems with respect to the electromagnetic valve train.

[0005] This object is achieved by means of the characteristics indicated in claim 1.

[0006] Accordingly, at least one information connection is established between two devices of an electromagnetic valve train by means of a glass fiber connection. A glass fiber connection is not susceptible to electromagnetic compatibility problems. Furthermore, such glass fiber lines also do not have to be electrically insulated. Also, otherwise existing contact difficulties are to be solved by corresponding connectors.

[0007] According to the embodiment, for example, the connections between a valve sensor or actuator sensor, on the one hand, and the controlling and regulating device, on the other hand, between an engine control and the controlling and regulating device, or between the electronic power system and the controlling and regulating device can be established by means of glass fiber connections. It is important in this context that the connection is used only as an information transmission. In contrast, an energy supply line is not replaced by means of a glass fiber cable. According to a particularly preferred embodiment, the different connections can also be partially constructed with glass fiber connections. Thus, for example, a path section which has special electromagnetic compatibility problems can be protected by means of a glass connection.

[0008] In the following, the present invention will be explained by means of different embodiment and with reference to the attached drawings.

[0009]FIG. 1 is a block diagram of a first embodiment of the present connection;

[0010]FIG. 2 is a block diagram of a second embodiment of the present connection; and

[0011]FIG. 3 is a block diagram of a third embodiment of the present connection.

[0012] In the case of the embodiments illustrated here, one power supply 10 as well as one engine control 18 respectively is provided.

[0013] In the embodiment according to FIG. 1, a valve control is indicated which, on the one hand, is connected with the power supply as well as with an actuator 14. These connections are conventionally constructed by means of electric cables. In contrast, the connection between a sensor 16 coupled with the actuator 14 and the valve control 12 is constructed by means of glass fibers. The connection between the valve control 12 and the engine control 18 is also constructed by means of a glass fiber connection.

[0014] In the embodiment according to FIG. 2, the devices of the electromagnetic valve train 20, specifically the actuator 26, the electronic power system 24, the electronic controlling and regulating system 22 and the sensor 28, are combined in an integral unit. The corresponding mutual connections are provided in the integral unit itself. For this reason, it is, in the case of this embodiment, only necessary to provide an electric cable connection to the power supply 10 as well as a glass fiber connection between the electronic controlling and regulating system 22 and the engine control 18.

[0015] In the embodiment according to FIG. 3, the devices electronic power system 24′, actuator 26′ and sensor 28′ are illustrated in a combined manner. In this embodiment, the power supply 10 is connected in a conventional manner by means of an electric cable with the electronic power system 24′. In contrast, the electronic power system 24′ and the electronic controlling and regulating system 22′ as well as the sensor 28′ and the electronic controlling and regulating system 22′ as well as the electronic controlling and regulating system 22′ and the engine control 18 are coupled by way of glass fiber connections.

[0016] The present combination of an information connection implemented by way of glass fiber connections between individual elements of the electromagnetic valve train and conventional power connections by means of electric cables ensures an information exchange, which is as protected from interferences as possible, between the individual parts and thereby contributes to the operational reliability of the entire electromagnetic valve train arrangement. 

1. Electromagnetic valve train of a charge cycle valve for an internal-combustion engine having an electromagnetic actuator and additional electric devices, such as a power part operating the actuator, a controlling and regulating device as well as a power supply, characterized in that at least one information connection is established between two devices by means of a glass fiber connection.
 2. Electromagnetic valve train according to claim 1, characterized in that a valve sensor or actuator sensor is provided and the connection between the valve sensor or actuator sensor and the controlling and regulating device is established by means of the glass fiber connection.
 3. Electromagnetic valve train according to claim 1 or 2, characterized in that the connection between an engine control and the controlling and regulating device is established by means of a glass fiber connection.
 4. Electromagnetic valve train according to one of claims 1 to 3, characterized in that the connection between the electronic power system and the controlling and regulating device is established by means of a glass fiber connection.
 5. Electromagnetic valve train according to one of claims 1 to 4, characterized in that the controlling and regulating device, together with the electronic power system, are combined in valve control. 